Convert weight and mass units — kilograms, pounds, ounces, grams, tons, stones.
| Unit | Name | Value |
|---|---|---|
| g | Gram | 1000 |
| mg | Milligram | 1000000 |
| t | Metric Ton | 0.001 |
| lb | Pound | 2.2046244 |
| oz | Ounce | 35.273991 |
| st | Stone | 0.15747312 |
The Kilogram (kg) and the Milligram (mg) are both units of weight & mass. Converting between them is straightforward using the formula above.
Formula: 1 kg = 1000000 mg
This converter uses internationally recognized conversion factors. All calculations are performed client-side in your browser — no data is sent to any server.
| Kilogram (kg) | Milligram (mg) | Real-world context |
|---|---|---|
| 1.0000e-06 kg | 1 mg | |
| 0.001 kg | 1000 mg | |
| 0.01 kg | 10000 mg | |
| 0.1 kg | 100000 mg | |
| 1 kg | 1,000,000 mg | bag of flour / sugar |
1 kilogram (kg) equals exactly 1,000,000 milligrams (mg). Use the formula: kg × 1,000,000 = mg.
To convert kilograms to milligrams, multiply your value in kilograms by 1,000,000. For example, 5 kg × 1,000,000 = 5,000,000 mg.
100 kilograms = 100,000,000 milligrams. Calculation: 100 × 1,000,000 = 100,000,000.
To convert milligrams back to kilograms, divide by 1,000,000 (or multiply by 1.0000e-06). Example: 10 mg ÷ 1,000,000 = 1.0000e-05 kg.
Yes. This converter uses the internationally recognised exact conversion factor: 1 kg = 1,000,000 mg. All calculations are performed in your browser with no rounding until display.
10 kilograms = 10,000,000 milligrams. Simply multiply by 1,000,000.
Converting kilograms to milligrams is commonly needed for medical dosing, laboratory measurements, pharmaceutical calculations, and quality control testing where one system uses kg and another uses mg.
The kilogram (kg) is the SI base unit of mass — one of seven fundamental units in the International System. Equal to exactly 1,000 grams, it is the foundation of weight measurement in science, medicine, engineering, and commerce worldwide. Uniquely among SI base units, the kilogram is named with a metric prefix ("kilo-" = 1,000).
The milligram (mg) is a unit of mass equal to one-thousandth of a gram (0.001 g) or one-millionth of a kilogram (10⁻⁶ kg). It is the standard unit for drug dosing in medicine and pharmacology, where precise small quantities are critical for safety and efficacy. The prefix "milli-" comes from Latin mille meaning one thousand.
Defined in 1795 by the French Revolutionary government as the mass of one cubic decimetre of distilled water at 4 °C. A platinum prototype (the Kilogramme des Archives) was created in 1799. From 1889 until 2019, the world's mass standard was the International Prototype Kilogram — a platinum-iridium cylinder stored in Sèvres, France. In 2019, the kilogram was redefined in terms of Planck's constant (h = 6.626 070 15 × 10⁻³⁴ J·s), eliminating the need for a physical artifact.
Interesting fact: The IPK and its official copies drifted apart by up to 50 micrograms over 130 years, motivating the 2019 redefinition. The kilogram is the only SI unit whose name starts with a prefix.
Established as a derived unit when the metric system was formalised in the late 18th century. The milligram rose to critical importance with the growth of pharmacology in the 19th and 20th centuries, as chemists isolated active compounds and found that tiny quantities produced strong therapeutic — or toxic — effects. Modern pharmacopoeias worldwide specify drug doses in milligrams.
Interesting fact: A single grain of table salt weighs about 58 mg. One standard 325 mg aspirin tablet means that 1,000 tablets weigh only 325 grams — less than a can of soft drink.